Tubular lamp



(No Model.)

W. MOARTHUR.

' TUBULAR LAMP.

No. 465,59; Patented Deo. 22, 1891.l

- UNITED STATES PATENT OFFICE.

VARREN MCARTHUR, CF CHICAGO, ILLINOIS, ASSIGNCR TO THE R. E. DIETZ COMPANY, OF NEI/V YORK, N. Y., AND THE STEAM GAGE AND LANTERN COMPANY, OF SYRACUSE, NEIV YORK.

TUBULAR LAMP.

SPECIFICATION forming part of Letters Patent No. 465,597, dated December 22, 1891. Application filed March 5,1891- SerialNo. 393,827. (No model.)

To all whom t 11i/wy concern? Be it known that I, WARREN MCARTHUR, a citizen of the United States, residing at Chicago, inthe county of Cook and State of Illinois, have invented anew and useful Improvement in Tubular Lamps, of which the following is a specification.

This invention relates to the oil-fount andA connecting parts of thatclass of tubular lamps lo in which the oil-forint is .surrounded by an air j jacket or casing which receives the air from the tubes at the bottom and through which the air ascends around the oil-fount to the burner mounted on the same. I5 construction is shown, for instance, in the patent to L. F. Betts, No. 218,917, August 26, 1879.

The object of my invention is to provide the lamp with a glass fount in such manner 2o that the contents can be seen through the surrounding air-jacket, thereby rendering it unnecessary to remove the fount from the jacket in order to ascertain the height of the oillevel. In the accompanying drawings, Figure 1 is fragmentary elevation of the lower portion of a tubular lamp Vprovided with my improvements. Fig. 2 is a vertical section in line xx, Fig. 1. Fig. 3 is an elevation of the oil-fount 3o -and surmounting parts removed from the airjacket. Fig. 4. is a horizontal section in line y y, Fig. 2. Fig. 5 is a fragmentary perspective View, and Fig. 6 a fragmentary horizontal section illustrating a modified construc- 3 5 tion of my improvement.

Like letters of reference refer to like parts in the several igures.

A represents the lower portions of the airtubes; B, the collar into which they open and 4o which has an open upper end; C, the postsocket secured in said collar,` and D the supporting-post.

E represents the air-jacket, which has its bottom provided with a central opening having an upturned ange e, by which the airjacket rests on the upper end of the collar B. F is the glass oil-fount, which is arranged A lamp of this lviewed through these openings.

within the air-jacket in such manner that the air entering thronghthe central opening in the bottom flows outwardly underneath the 5o bottom of the oil-fount and upwardly along the sides of the same. As shown in the drawings, the oil-fount is attached to a top plate H by rods h, and suspended in the air-jacket by the top plate resting with its. marginal' 55 portion upon an annular bead z', formed in the upper portion of the air-jacket. Itis obvious, however, that the oil-fount can be supported upon ribs or projections secured to the bottom of the air-jacket.

The oil-fount is provided in its top with a screw-threaded collar j, to which a metallic burner-seat J is secured. K represents the burner seated in this seat, and L represents the burner-cone, resting with its skirt upon the topplate H, which is provided with a central opening somewhat larger in diameter than the burner, so that the air ascending along. the sides of the oil-fount passes inwardly between the top of the the fount and the top 7o plate, and so reaches the burner.

M represents openings formed in the side wall of the air-jacket, preferably diametrically opposite each other, so that the contents of the transparent oil-fount can be The oilfount is provided on its sides with lateral enlargements N, which fit against these openings and whereby the vtransparent walls of the fount are brought out nearly flush with the 8o air-jacket, which arrangement greatly facilitates the observation 'of the oil in the fount. These enlargements serve, further, to close the air-space 0, which exists between the side of the fount and the jacket and prevent the in- S 5 gress or egress of air to and from this airspace through the side openings. The openings in the jacket are preferably provided with inwardly-projecting flanges p, which make a close joint with the lateral enlarge- 9o ments of the fount. If desired, the lateral enlargements maybe omitted and the flanges p be extended inwardly to t against the side of a cylindrical fount, as represented in Figs.

5 and 6. In this construction the fount is preferably provided with upright ribs q, which lit against the upright flanges and assist in making a @lose joint between the t'ount and the air-jacket at the openings.

R represents the vertically-adjustable tray upon which the Wick rests, and whereby the time during Which the lamp burns is regulated. This tray isalso exposed to View through the side openings.

I claim as my invention* l. The combination, Wit-h the air-jacket provided with a side opening, of a transparent Voil-fount arranged Within the air-jacket and separated therefrom by an air-space and having a lateral enlargement Wheh fits against the opening in the jacket, substantially as set forth.

2. The combination, with the air-jacket provided -with a side opening surrounded by inwardly-projecting flanges, of a transparent oil-fount arranged vWithin the air-jacket and separated therefrom by an air-space, the fount bearing against said lianges, whereby the airspace is olosedaround the opening', substantially as set forth.

Vitness my hand this 26th day of February, 1891.

WARREN MOARTHUR. Vitnesses:

Jos. LUDEs, G. C. MCARTHUR. 

